<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>上帝也爱我</title>
		<link rel="stylesheet" href="style.css"><meta name="viewport" content="width=device-width, user-scalable=0, initial-scale=1, viewport-fit=cover">
		<script src="https://cdn.staticfile.org/jquery/3.2.1/jquery.min.js"></script>
		<script src="awardRotate.js"></script>
	</head>
	<body>
	  <!--主要内容块-->
        <div class="container kt-first-layout-module">
            <div class="row">
                <div class="col-sm-12 text-center mt-5">
                    <div class="TurntablePage">
                        <div class="TurntableBox">
                            <div class="title allTitle">送女友什么生日礼物？（示例）</div>
                            <div class="turnplate">
                                <canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
                                <img class="pointer" src="start.png">
                            </div>
                        </div>
                        <div class="editBox">
                            <a href="javascript:;" class="editBtn">自定义转盘</a>
                        </div>
                        <div class="warning">
                            选择困难症者的助选神器。<br/>让选择变成娱乐。<br/>本工具仅供娱乐参考，对结果不承担任何责任
                        </div>
                        <div class="editContent">
                            <div class="title">
                                <input type="text" id="title" placeholder="请输入主题" value="">
                            </div>
                            <h1>请输入选项（最少2组）</h1>
                            <div class="optionBox">
                                <div class="options"><input type="text" placeholder="输入新选项(最多五个字符)"  /></div>
                                <div class="options"><input type="text" placeholder="输入新选项(最多五个字符)"  /></div>
                            </div>
                            <div class="btns">
                                <button class="btn btn-success btn-mini addInput" id="addInput">新增</button>
                                <button class="btn btn-primary done" id="done" >完成</button>
                            </div>
                        </div>
                    </div>
                </div>

            </div>
        </div>
        <!--文字说明块-->
        <div class="container kt-layout-module">
            <h4 class="kt-fs16 kt-fc-title">抽奖记录</h4>
            <hr>
            <blockquote class="blockquote">
                
            </blockquote>
        </div>
        
<div id="myDialog" class="dialog" style="display:none">
  <div class="dialog-content">
    <span class="close">&times;</span>
    <p id="dialogText"></p>
  </div>
</div>
		
	</body>
	
	<script>
function openDialog(text, duration) {
  var dialog = $('#myDialog');
  var dialogText = $('#dialogText');

  // 设置对话框文字内容
  dialogText.text(text);

  dialog.show();

  setTimeout(function() {
    dialog.hide();
  }, duration);
}
    $(document).ready(function() {
        init();

        //页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
        var turnplate = {
            restaraunts: [], //大转盘奖品名称
            colors: [], //大转盘奖品区块对应背景颜色
            outsideRadius: 192, //大转盘外圆的半径
            textRadius: 150, //大转盘奖品位置距离圆心的距离
            insideRadius: 20, //大转盘内圆的半径
            startAngle: 0, //开始角度
            bRotate: false //false:停止;ture:旋转
        };

        // 动态添加大转盘的奖品与奖品区域背景颜色
        turnplate.restaraunts = ["衣服", "首饰", "化妆品", '包包', '鞋子', '大餐', '旅游']
        var restaraunts = JSON.parse(localStorage.getItem('restaraunts'));
        if (restaraunts && restaraunts.length > 1) {
            $('.allTitle').text(localStorage.getItem('title') ? localStorage.getItem('title') : '未知主题');
            turnplate.restaraunts = restaraunts;
        }
        var colorsArr = ["#FFF4D6", "#FFFFFF", '#fff0c8', '#33D082', '#999CB6', '#33D0FF'];
        returnColor();

        drawRouletteWheel();
		
		loadhistory();
		
		 $('.close').click(function() {
			$(this).closest('.dialog').hide();
		});
  

        function returnColor() {
            var a = turnplate.restaraunts.length;
            var color = turnplate.restaraunts.map(function (item, index, array) {
                if (a % 2) {
                    return (index + 1) == a ? colorsArr[2] : colorsArr[index % 2]
                } else {
                    return colorsArr[index % 2];
                }
            })
            turnplate.colors = color;
        }

        $('.title').on('input', 'input', function () {
            $(this).val() == '' ? $(this).siblings('a').hide() : $(this).siblings('a').show();
        })

        $('.optionBox').on('input', '.options input', function (e) {
            $(this).val() == '' ? $(this).siblings('a').hide() : $(this).siblings('a').show();
            if ($('.optionBox .options input').length > 2) {
                if ($(this).val() == '') {
                    $(this).parent('.options').remove();
                }
            }
        });
        $('body').on('click', '.delete', function () {
            $(this).siblings('input').val('');
            $(this).hide();
        });
 
        $('#addInput').click(function () {
            $('.optionBox').append('<div class="options"><input type="text" placeholder="输入新选项(最多五个字符)" /></div>');
        });

        function buildDom() {
            var html = '';
            turnplate.restaraunts.forEach(function (item, index, array) {
                html += '<div class="options"><input type="text" value=""  /><a href="javascript:;" class="delete"></a> </div>';
            });
            $('.optionBox').html(html)
        }
        window.onload = function () {
            drawRouletteWheel();
        };
 
        $('.editBtn').click(function () {

            $(this).hide();
            $('.editContent').show();
            $('#done').show();
            //buildDom();
        });
        $('#done').click(function () {
            var flag = 0;
            var newData = []
            $('.optionBox .options').each(function () {
                var val = $(this).find('input').val();
                if ($.trim(val) != '') {
                    flag++;
                    newData.push(val);
                }
            });
            if (flag >= 2) {
                // 添加本地缓存
                localStorage.setItem('restaraunts', JSON.stringify(newData));
                localStorage.setItem('title', $('#title').val());
                turnplate.restaraunts = newData;
                returnColor();
                drawRouletteWheel();
                $(this).hide().siblings('.editBtn').show();
                $('.editContent').hide();
                $('.allTitle').text(localStorage.getItem('title'));
                $(this).hide();
                $('.editBtn').show();
                $('.TurntableBox').show();
            }
        });
        $('.pointer').click(function () {
            if (turnplate.bRotate) return;
            turnplate.bRotate = !turnplate.bRotate;
            //获取随机数(奖品个数范围内)
            var item = rnd(1, turnplate.restaraunts.length);
            //奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
            rotateFn(item, turnplate.restaraunts[item - 1]);
            // console.log(item);
        });

        function rnd(n, m) {
            var random = Math.floor(Math.random() * (m - n + 1) + n);
            return random;
        }
        var rotateTimeOut = function () {
            $('#wheelcanvas').rotate({
                angle: 0,
                animateTo: 2160,
                duration: 8000,
                callback: function () {
                    alert('网络超时，请检查您的网络设置！');
                }
            });
        };

        //旋转转盘 item:奖品位置; txt：提示语;
        var rotateFn = function (item, txt) {
            var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length * 2));
            if (angles < 270) {
                angles = 270 - angles;
            } else {
                angles = 360 - angles + 270;
            }
            $('#wheelcanvas').stopRotate();
            $('#wheelcanvas').rotate({
                angle: 0,
                animateTo: angles + 1800,
                duration: 8000,
                callback: function () {
                  
					
					// 添加历史记录
					  var currentTime = new Date().toLocaleString();
					  var historyItem = {
						title:$(".allTitle").html(),
						prize: txt,
						time: currentTime
					  };

					  // 获取历史记录数组
					  var history = JSON.parse(localStorage.getItem('god-history')) || [];
					  history.push(historyItem);

					  // 将历史记录保存到 localStorage
					  localStorage.setItem('god-history', JSON.stringify(history));

						loadhistory();
	  
						openDialog('选中：' + txt, 30000);
					
                    turnplate.bRotate = !turnplate.bRotate;
                }
            });
        };
		
		function loadhistory()
		{
			 var history = JSON.parse(localStorage.getItem('god-history')) || [];
			 					  // 显示历史记录
			  // 按时间倒序排列历史记录
  history.sort(function(a, b) {
    return new Date(b.time) - new Date(a.time);
  });
					  var historyHtml = '';
					  for (var i = 0; i < history.length; i++) {
						historyHtml += '<p class="kt-fs13 kt-fc-desc">'+'《'+history[i].title+'》' + history[i].prize + '。 时间：' + history[i].time + '</p>';
					  }
					  $('.blockquote').html(historyHtml);
		}

        function drawRouletteWheel() {
            var canvas = document.getElementById("wheelcanvas");
            if (canvas.getContext) {
                //根据奖品个数计算圆周角度
                var arc = Math.PI / (turnplate.restaraunts.length / 2);
                var ctx = canvas.getContext("2d");
                //在给定矩形内清空一个矩形
                ctx.clearRect(0, 0, 422, 422);
                //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式
                ctx.strokeStyle = "#FFBE04";
                //font 属性设置或返回画布上文本内容的当前字体属性
                ctx.font = '16px Microsoft YaHei';
                for (var i = 0; i < turnplate.restaraunts.length; i++) {
                    var angle = turnplate.startAngle + i * arc;
                    ctx.fillStyle = turnplate.colors[i];
                    ctx.beginPath();
                    //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）
                    ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
                    ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
                    ctx.stroke();
                    ctx.fill();
                    //锁画布(为了保存之前的画布状态)
                    ctx.save();
                    //----绘制奖品开始----
                    ctx.fillStyle = "#E5302F";
                    var text = turnplate.restaraunts[i];
                    var line_height = 17;
                    //translate方法重新映射画布上的 (0,0) 位置
                    ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);
                    //rotate方法旋转当前的绘图
                    ctx.rotate(angle + arc / 2 + Math.PI / 2);
                    /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
                    if (text.length > 6) { //奖品名称长度超过一定范围
                        text = text.substring(0, 5) + "||" + text.substring(5);
                        var texts = text.split("||");
                        for (var j = 0; j < texts.length; j++) {
                            ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 3, j * line_height);
                        }
                    } else {
                        //在画布上绘制填色的文本。文本的默认颜色是黑色
                        //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
                        ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
                    }
                    ctx.restore();
                    //----绘制奖品结束----
                }
            }
        }

        function init() {
            
        }
    });
</script>
</html>